Mining-machine



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F. M. LEGHNER. Mining Machine.

No. 232,280. Patented Sept.'14,1880.

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Mining Machine. No. 232,280. Patented Sept. 14, I880.

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Mining Machine. No. 232,280. Patented Sept. 14,1880.

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rrn STATES PATENT rrrcn.

FRANOEIS M. LEOI-INER, OF WAYNESBURG, ASSIGNOR TO LEOHNER MINING MACHINECOMPANY, OF COLUMBUS, OHIO.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 232,280, datedSeptember 14, 1880.

Application filed May 31, 1880. (No model.)

To all whom it may concern Be it known that I, FRANOEIS M. LECHNER, ofWaynesburg, in the county of Stark and State of Ohio, have inventedcertain new and useful Improvements in Mining-lvlaohines; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

Figure 1 is a side view of my improved cutter-bar. Fig. 2 is atransverse section taken on line a as, Fig. 1. Fig. 3 is a transversesection taken on line 2 2, Fig. 1. Fig. 4 is a transverse section online a a; m m, Fig.1. Fig. 5 is a transverse section on line y y,Fig. 1. Figs. 5 and 5 show a clamp. Fig. 6 is a side view of one of thesupporting-shoes at the end of the cutter-bar carrier. Fig. 7 is a topor plan View of the same. Fig.8 is alongitudinal section of the shaft,the sleeve, and the frictionclutch and the devices employed forwithdrawing the cutters from the coal. Fig. 9 is a longitudinal sectionof the screw and nut-carrier, which thrusts the cutters forward into thecoal. Fig. 10 is a plan view of the yoke which connects theshipping-lever with the nut-carrier. Fig. 11 is a vertical section takenon line .90 m, Fig. 9. Fig. 12 is a vertical section taken on line 3/ 3Fig. 9. Fig. 13 is a side elevation of the engine-frame. Fig. 14. is avertical section of one end of one of the driving'shafts and itssupports. Fig. 15 is a similar section of another construction ofshaft-bearin g. Fig. 16 is a plan view of a machine embodying myinvention, which in its general organization is like the machine shownin my Patent No.197,734, dated December 4, 187 7, and of which,therefore, I need only give a brief description.

Referring to Fig. 16, K K are the sills; K K the cross-girts 5 L L, thecarriers 5 M M, the engine-cylinders; N N. the steam-chests O, thecrank-shaft; 0, the spur-pinion on the crankshaft; I a spur-gear on themain driving-shaft, which is squared, as at p, to receive thedriving-chain Q, which communicates motion to second shaft, I, fromwhich the cuttershaft is driven. It It are scraper-chains, the frontends of which are mounted on shaft S,

which revolves in bearings s 8, formed for its support in or upon thesliding carriers L. As the parts embodying the invention for whichprotection is sought in this patent are shown in detail and enlarged, Ihave not thought it necessary to refer to them particularly whendescribing this Fig. 16, but will now proceed to do so.

Referring to Figs. 1,2, 3, 4, 5, A is the body of the cutter-bar,preferably round in crosssection and of substantially uniform diameterfrom end to end, except that it is reduced in size at A to receive itsbearing-boxes, and is provided with ears or lugs A to receive the linksof a driving-chain; but as the construction of these lugs and thedriving-chain is fully explained in a prior patent of mine, they neednot be specifically described here. This cutter-bar is provided atsuitable distances apart with sockets to, to receive the shanks a of thecutting-teeth, which are adj ustably secured within the sockets by meansof set-screws a, so that they may be made to cut a kerf of any desiredthickness in the coal.

A A are supporting-lugs projecting from the face of the bar and cast inone piece therewith. The bar is rotated in the direction indicated bythe arrow in Fig. 5, and the front faces of the lugs are employed tosupport cutting-teeth against backward thrust by means which I will nowexplain, these faces being arranged on lines not radial to the axis ofthe cutter-bar, but on lines parallel to radial lines.

In Figs. 5 and 5 B and b b constitute a clamp, of whichB is the body andb b are in closing-arms, between which latter is an opening or throatdovetailed in plan, (see Fig. 5 and tapering from the bottom toward thetop, as shown in the vertical section Fig. 5

B is a cutting-tooth, the shank of which is secured in the throat b.

b represents a set screw which passes through the clamp and into ascrew-threaded hole, in the cutter-bar, the relation of parts being suchthat when the clamp is screwed to its place upon the cutter-bar the rearside of one of the jaws b abuts against the front face of the lug A, andis supported thereby when the cutter-bar is rotated in the directionindicated by the arrow, Fig. 5.

The under face of the clamp 13 and the cor- 2 eeaeec responding end ofthe shank of the cutter B are rounded to fit closely the cutter-bar; or,when preferred, the cutter-bar may be flattened at this point, in whichcase the corresponding parts of the clamp and cutter-shank should bemade flat.

It will be readily understood that these devices will hold the-cutter Bfirmly in position, and that when the cutting-bit wears away thetapering shank can be reduced a little upon two sides by grinding, andthrust farther through the clamp B, a suitable backin g being interposedbetween the lowcrcnd of the'shank and the cutter-bar.

Referring to Figs. 6 and 7, E is the upper,

and E the lower, member of the shoe, divided centrally on the line 0 e.

The projecting shank end of the shoe is narrow, and is constructed withthe rim' or boss 0 upon each side, the inner walls of this boss beingcoincident with the central opening, and thereby forming a broad supportfor the boxing 0 in which the cutter-shaft is mounted it beingunderstood that there is one shoe upon the forward end of each of thesliding cutter carriers of the machine.

When preferred the upper member, E, may be provided with a dovetailedrib, 0 projecting inwardly from the inner vertical face and adapted toenter a correspondingly shaped seat formed in the front end of thecarrier, whereby this rib assists in supporting the upper member, E,against the upward thrust which is produced by the cutting action of thebits upon the coal, and thereby relieving materially the bolts orset-screws which pass through the holes a for the purpose of securingthe shoe to the sliding carrier.

Referring to Fig. 8, O is a shaft provided at each end with bearin gs,which are mounted in the boxes 0 C".

O O is a sleeve or thimble mounted upon the shaft, and firmly securedthereto by means of pins which pass through both the sleev and the shaftat 0.0.

The end O of the thimble is made flaring, as indicated, for a purposewhich will soon be explained.

D D is a friction-driver mounted loosely upon the shaft 0, the end D ofthe driver being in the form of a hollow conical wedge, and adapted tofit closely within the conical portion 0 of the thimble.

1) represents a sprocket-wheel formed upon or attached to the driver,and in practice driven by means of a suitable chain from one of thedriving-shafts of the machine.

The bearing 0* is provided with a tubular extension, 0 which isscrew-threaded externally.

E is a hand-wheel mounted loosely on shaft (J. One end,E of the hub ofthis hand-wheel is expanded and screw-threaded internally to fit thescrew-threaded extension 0". The opposite end or side of the hub of thehand-wheel is reduced in external diameter, so as to enter a recessformed for its reception in the adjacent end of thefriction-driver, andis provided with an external groove to receive the inner ends ofset-screws d, which pass through the end of the driver.

From an examination of Fig. 8 it will be readily understood that whenthe parts are in the position there shown the tubular wedge D of thedriver is held in close contact with the flaring end 0" of the thimble,so that a rotation of the driver will carry with it the thimble and theshaft 0 5 but the hand-wheel IE will remain stationary during suchrotation by reason of its frictional contact with the tubular extensionWhen, however, it is desired to withdraw the wedge D from contact withthe thimble the hand-wheel is turned in the proper direction, and itsengagement with the thread on will accomplish this result.

The nut-carrier is represented in Figs. 9, 10, ll, 12, in which theinner portion of said carrier consists of a cylindrical end, F providedwith a central opening of such size as to receive the screw-threadedshaft, a smaller cylindrical portion, F and an intermediate conicalportion provided upon three sides with recesses or throats which areequidistant from each other.

F is a shell or sleeve, tapering in form and of such size at its smallerend as to fit closely the part F and having its larger end cylindricalin form and of such size as to fit closely the enlarged portion F of theinner section of the carrier. The sleeve is provided with threelongitudinal slots, f, arranged centrally of the recesses in the innerportion. Three nut-sections, E (see Figs. 9 and 12,) are seated in therecesses above referred to, and are pro vided upon their in ner faceswith screw-threads corresponding to the thread on the feedingscrew, eachof the nut-sections being connected with the sleeve by means of aflat-headed screw, f, which passes through the slot f.

From an examination of Fig. 9 it will be readily understood that whenthe sleeve is moved in the direction indicated bythe arrow thenut-sections will be withdrawn from contact with the screw by reason ofthe engagement of the heads of the bolts f with the outer face of thesleeve.

In order to readily shift the sleeve upon the inner section I employ thefollowing devices: G G G is a circular yoke loosely surrounding thesleeve at its greatest diameter and provided with ears, the ear G beingpivoted to a suitable support on the frame of the machine, the ear Gbeing connected to a shipping-lever arranged at some convenient pointupon the frame-work of the machine, as will be found most convenient.

F F is a groove extending around the largest portion of the sleeve, andg g are curved blocks fitting loosely in this groove and connected withthe yoke G G G by means of set-screws or bolts 9, which pass throughholes g in the yoke. These devices furnish a convenient means forshifting the sleeve backward and forward on the inner portion of the bya chain passing around the sprocket-wheel F longitudinal motion of thenut-carrier relative to the sliding frame and carrier is pre-- vented,so that when the nut-sections are in engagement with the screw-shaft therotation of the nut-carrier will feed the cutter forward into the coal.

H, Fig. 14, represents one of the sills or side bars of the main or bedframe, H being one of the sliding carriers, which, in this instance, isconstructed of a T-iron. H is a section of the engine-frame, which isfirmly bolted to the carrier H.

I represents one of the driving-shafts by means of which power istransmitted from the engine-shaft or crank-shaft to the cutter-bar. I isa sliding boX, which carries one end of the shaft I, and is providedwith a bearing or bushing, 1 adapted to be readily replaced when worn.The bearing 1 is supported between two flanges, h h, projecting from thebase or lower part, H of the engine-frame, and is adjust able thereonfor the purpose of tightening the driving-chain which connects shaft Iwith the cutter-shaft at the forward end of the carrier H by anysuitable mechanism, preferably one of those shown in an earlier patentof mine.

In Fig. 15 the parts H H are substantially the same in structure asthose in Fig. 14, except that the lower portion of the part H is formedinto a dovetailed rib, h h I is a shaft corresponding to the shaftmarked I in Fig. 14. J J is a bearing-block, in which one end of shaft Iis mounted. The upper part, J, of

this bearing is detachable from the lower part, J, and issecured'thereto by means of set- (Not shown.)

screws or bolts.

In practice a rotary motion is imparted to the shaft I by means of adriving-chain, which e011- nects it with a shaft mounted near the upperend of the engine-frame H so that when in operation there is a heavyupward pull upon said shaft, and by an examination of this figure (Fig.15) it will be readily understood that such upward strain is borne bythe lower solid portion, J, of the hearing, by reason of its engagementwith the lower edge, h of the dovetailed rib.

What I claim is- 1. In a mining-machine, a cutter-bar provided withprojecting spurs or lugs adapted to support the cutting-teeth,substantially as set forth.

2. The combination, with the cutter-bar provided with the projectingspurs, of the clamp B, for attaching the cutting-teeth to the bar,substantially as set forth.

3. The combination, with the shaft 0 and the sleeve having the conicalportion 0 of the driver D, hand-wheel E and the tubular screw-threadedbearing 0 0 substantially as set forth.

4. The combination, with the cutter-bar, of the shoe E E, provided withthe rim or boss 0, adapted to support the boxing 0 substantially as setforth.

5. The combination, with the nut-carrier, of the yoke G G G and theblocks g, seated in the groove F, substantially as set forth.

6. The combination, with the dovetailed rib h h and the shaft I, of thedivided bearingblock J J, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this13th day of May, 1880.

FRANOEIS MARION LEOHNER.

Witnesses:

HENRY W. NEEREAMER, THOMAS C. ORNDORFF.

